Finding the Fourth Proportional to 12,680.56, 17,498.85 and 7,015.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,680.56 : 17,498.85 = 7,015.62 : x
2. Step 2: Convert to fraction form
   12,680.56/17,498.85 = 7,015.62/x
3. Step 3: Cross multiply
   12,680.56x = 17,498.85 × 7,015.62
4. Step 4: Simplify right side
   12,680.56x = 122,765,282.04
5. Step 5: Solve for x
   x = 122,765,282.04/12,680.56
6. Step 6: Final answer
   x = 9,681.38